S8, E20: Rachel panics during a party in anticipation of her baby's birth when she realizes how totally unprepared she is to care for an infant. She reluctantly agrees to allow her frustrating mother, Sandra (recurring guest star Marlo Thomas - "That Girl"), to move in to help her, upsetting Rachel's roommate, Ross. Meanwhile, Monica tries to atone for forgetting to invite Sandra to the party. Chandler and Ross exhaust themselves by repeatedly playing a befuddling game in an effort to help Joey prepare to audition as a television game show host.